Can



Agg. 22, 1939.

w. M. 'VOGEL cfm Filed March 2e, 1938 l INVENTOR Qi/v @d Patented Aug. 2z, 1939v UNITED STATES PATENT OFFICE CAN William Martin Vogel, Bloomfield, N. J.' 'Application March 26,'1938, serial No. 198,173

1Claim.

This Ainvention relates to cans or similar receptacles and particularly those in which the body of the can or receptacle is made of cardboard or some similar relatively soft and compressible material. Cans of this character as made at the present time are composed oi a cylindrical body made o f cardboard and closed at the opposite ends 'by means of sheet metal closure members or caps.

lll It has been found relatively dii'licult to provide some satisfactory means by which these metal end caps or covers can. be successfully attached to the ends of the-cardboard body.l Any means of attachment employed for -uniting the -lli closure members or caps with the cardboard The object of this invention therefore, is to provide a simple and practical means by which the sheet metal end caps or closure members may be attached to a tubular body or cardboard or other compressble material, to meet all of the requirements above mentioned. l A further object of the invention is to .provide lmeans for so attaching the ends of the can, that said ends may be speedily and securely attached to the can body with a minimum of labor and without'the performance of extraordinary assembly operations.

A further objectof the invention is toprovide a new and novel method for effectively attaching sheet metal end members to a cardboard can In the drawing` wherein an embodiment of the invention is shown, Fig. 1 is a side elevation, 'with parts in section, of a can made in accordance with the invention, the closure members Y vor caps being purposely enlargedl to more readi- 1y disclose construction;v Fig. 2 is a sectional view through a part of the can body and through the ange portion of one .of the caps before the flange is distorted; Fig. 3. is a sectional View Ysimilar to Fig. 2 showing the flange portion of the cap in its final position as Aapplied to the -end ofthe body of the can; and Fig. 4 is a. sectional view showing'a modied'structure.

(Cl. 229--5.6)v

adapted to be closed by means of the closure members or' caps 2. Each of said closure members or caps is composed of a body portion 3 of disc-like form having its marginal edge channelled as indicated at 4, said channel including g the outer downwardly extendingflange'5 and the inner Wall E integrally connected to the flange. The end portion oi the cardboard body i fits into the channel 4 and is thus 'disposed between the iianges 5 and 6. The outer, downloA wardly extending, flange 5 has its lower edge continuously rolled up or beaded as at l, or otherwise continuously reinforced' to stiifen the eritire flange. The inner wall E is shorter or oi less depththan the outer ange E. l5

The ilrst step in the method of attaching the caps .2 to the ends of the body portion is indicated in Fig. 2. In 'its initial form each ca'p 2 is in the shape shown in Fig. 2 where it will be seen that the inner flange t is straight or un- 20 deformed. In this condition, the cap vis insert' ed on the end of the body portion l so that the end of said body portion ts into the channel 4. Then rotating forming-rollers d apply lateral pressure against the. exposed faces of the inner 25 wall t, said pressure-being exerted in the direction of the arrow in Fig. 2, causing the wall 6 to be distorted or deformed outwardly to provide an annular lateral projection or rib 9 in wall 5, as clearly shown in Figs. i and 3. The forma- 30 tion of such projection by the action of the rollers 8 causes the compre'sslble body portion i to be deformed within the channel L substantially as shown. in Fig. 3 and rmly gripped between ange 5 and the projection or rib 9 and 35 a very secure attachment of the cap on the upper end of the body portion i results. It will be noted that the lateral projection 9 formed 'in the wall 6 is located above the stiii'ened or beaded Alower edge l ofV flange E. 40

The edge shape of the formingrollers 8 determines the shape of the' distorted portion 8 of the innenwall E. For example, by the use oi' a distorting roller of an edge shape slightly different from that shown in Fig. 2, the type of 45 projection shown at i0 in Fig. 4 can be made in l the 'wall l6. 'I'he shape of the projection produced in thewall 6 and the extent to which it compresses and deforms the portion of the car y board wall of the container between it and the inner face of the outer ange 5 is. dependent to a. considerable extent upon the softness, re-

. siliency and other factors, ofthe type of cardi board or other compressible material used for the formation of the wall of the receptacle, 55

It will, of course, be understood that while the forming-rollers 8 are operating to distort the wall 6 outwardly, the Wall ange 5 is suitably backed or otherwise supported and prevented. from being deformed by said pressure. so that thedeformation occurs only in the wall 6 land not in the outer ange 5.

By the application ofvacap or closure member to the end of a compressible body portion in the manner shown, a. strong and effective closure is provided which will not only reinforce and stiien the structure of the can, but will be leakproof under all conditions of use.

What I claim is:

A closure for cans comprising, a canV body` body composd of compressible material such as cardboard, a. closure cap for iitment over one end of the can body, said closure cap being formed at its periphery with an upwardly extending wall having an voutwardly and downwardly extended flange portion co-operating with the wall to-form a channel between said wall and the ange into which the end of the can body is tted, said flange being of greater depth than the wall, the flange having its end provided with' a continuous inwardy-rolled bead located below the lower end of the wall and thereby stiffenng the end of the ange below the end of the wall, the Wall having a laterally distorted portion directed into the channel above the stiiened, beaded end of the flange and co-operating with said stiiened, beaded end of the ange to engage, grip and distort a portion of vthe compressible body of Ithe can between them.

WIILIAM MARTIN VOGEL. 

